Design and Build a Hazardous Gas Monitoring Device (CO, CO2, CH4) Upon Cigarette Smoke in an Enclosed Space Based on Arduino Uno and GSM SIM 900 A

Abstract

Increasing cigarette usage in daily activities contributes to air pollution caused by cigarette smoke, which is a factor in the onset of numerous respiratory ailments. This research intends to develop a technology that will simplify users' monitoring of hazardous gases (CO, CO₂, and CH₄) levels in a room using Arduino Uno and GSM SIM 900A with MQ-4, MQ-9, and MQ-135 sensors. The method comprises hardware design, software design, and testing. The research was performed twice. The testing gas employed in this research is cigarette smoke gas. The red LED, fan, and buzzer turn on when the CH₄ gas level reaches 250, the CO level reaches 300, or the CO₂ gas level reaches 2000. A GSM SIM 900A sends a short message through SMS to the user's device. The initial test results were acquired in the 240th second when CH₄ gas reached 299.84 299.84 ppm (hazardous), CO reached 310.06 ppm 299.84 ppm (hazardous), and CO₂ reached 291.45 ppm (safe). The second test revealed that at 160 seconds, CO₂ reached 308.98 ppm (hazardous), CO reached 161 ppm, and CH₄ reached 315.6 ppm (hazardous). Three media specialists conducted validation to determine the viability. The average category rating for the validation test findings was 95.5% so that the instrument can monitor the room's gas levels.